The invention discloses an anti-seepage construction method of a connector of an HDPE (high-density polyethylene) plastic steel winding pipe. The anti-seepage construction method comprises the following steps of (S01) preparing two to-be-connected HDPE plastic steel winding pipes at low temperature; (S02) respectively sleeving elastic fillers which are matched with circular grooves in the circular grooves of outer rings of the two HDPE plastic steel winding pipes; (S03) wrapping rubber sleeves on the outer rings of the two HDPE plastic steel winding pipes, wherein the length of the rubber sleeves in pipelines is set, so that the elastic fillers can be respectively wrapped; (S04) wrapping middle cushion layers on the rubber sleeves; and (S05) wrapping stainless steel hoops on outer rings of the middle cushion layers, and tightening the stainless steel hoops. By adopting the technical scheme, the elastic fillers are arranged in the outer rings of the pipelines, the contact area between the pipelines and the rubber sleeves is greatly increased by the elastic fillers, and then the middle cushion layers are wrapped on the rubber sleeves and are tightened by tightening the outside stainless steel hoops, so that the sealing performance between connectors is good.